Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c280994949717ff…

MALICIOUS

PDF

85.1 KB Created: 2021-04-06 19:34:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0735f211aed98d88a082dcf82f3aea0b SHA-1: 10cadd9dbb024c054db9ff20ed34a79edae19bfb SHA-256: 1c280994949717ff7f60951fed912341a0d4100174307496aecaced8bf077883
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mezovuduw.ru/123?utm_term=formation+m%25C3%25A9diation+barreau+de+paris PDF link annotation
    • http://fudoviwil.mywebcommunity.org/authorization_letter_to_claim_passport.pdfIn PDF document text
    • http://zugamumenune.22web.org/62640492517.pdfIn PDF document text
    • http://midebozizigod.iblogger.org/fluke_battery_tester.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_6037e3e60e0e7.pdfIn PDF document text
    • https://wegonugu.weebly.com/uploads/1/3/4/0/134040733/7124527.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488556/normal_5fdb2951b0bdf.pdfIn PDF document text
    • https://gunobodupisar.weebly.com/uploads/1/3/4/6/134677737/2095316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385014/normal_5fe651a4604fc.pdfIn PDF document text
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/3a6393d68beb78a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7de2b42-bb4d-4511-8f32-204e8f9d3b92/distinguish_between_hard_return_and_soft_return.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/xowepa.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/cisco_firepower_ips_deployment_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/38211065487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c75c526-82a0-4cde-accb-f890cc31cc77/7767214670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/875a3f3d-e875-4f68-81a7-098b455c2ca7/how_do_i_reset_my_jitterbug_phone.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/all_actress_wallpaper.pdfIn PDF document text
    • http://suxudogakol.myartsonline.com/27381114179.pdfIn PDF document text
    • http://sujutesar.rf.gd/asia_map_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/latest_hollywood_dubbed_mp4_movies_free.pdfIn PDF document text
    • http://wuluzakasuw.epizy.com/brittany_perille_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3bfdc2e-3b45-42cf-88af-97748911300f/how_to_manual_regen_6.7_powerstroke.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/cdc_gbs_positive_guidelines.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10982 5312 bytes
SHA-256: d9d31fdb9cc6e7c13b44f0832f43c0a0b8ec70cadcd53b1e222411541190460e
font_01_sfnt_off00011b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B26 13252 bytes
SHA-256: 81228df9fb145fde9e2bce3437a33b5845d476d2faec184aeb99a298f37b19b6

Open this report in the interactive analyzer, or submit your own file for analysis.